|Publication number||US7823269 B2|
|Application number||US 11/893,587|
|Publication date||Nov 2, 2010|
|Filing date||Aug 16, 2007|
|Priority date||Oct 17, 2006|
|Also published as||EP1914672A2, EP1914672A3, US20080088459|
|Publication number||11893587, 893587, US 7823269 B2, US 7823269B2, US-B2-7823269, US7823269 B2, US7823269B2|
|Inventors||Philippe Martin, Philippe Lecire|
|Original Assignee||Tagsys Sas|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (4), Classifications (11), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application claims the benefit of the filing date of U.S. Provisional Patent Application No. 60/852,352 filed Oct. 17, 2006, the disclosure of which is hereby incorporated herein by reference.
The present invention relates to the field of Radio Frequency Identification (RFID) tags and in particular relates to a method and apparatus for manufacturing an auxiliary antenna for an RFID tag.
RFID tags are used to associate an object with information stored in the tag such as an identification code. The RFID tag is read via the principle of electromagnetic (EM) communication wherein an interrogator containing a transmitter generates an EM signal that is transmitted via an antenna associated with the interrogator to an antenna associated with the tag. In a passive tag the antenna receives a portion of the transmitted energy and through a rectifier generates DC power for operating a reply generation circuit. The reply generation circuit encodes the information stored in the tag into an EM reply signal that is radiated by the antenna. The radiated signal is received by the interrogator antenna and the information is decoded by the interrogator.
A typical RFID tag module has a limited read range that may be less than 40 cm. To enhance performance of the tag when it is applied to an object it is known to couple a secondary or auxiliary antenna to the antenna on the tag. The auxiliary antenna may be larger than the tag antenna and may be located on the same object in close proximity to the tag antenna so that it is electromagnetically coupled thereto.
Prior art methods for manufacturing such range enhancing or auxiliary antennas include etching of suitable conductors such as copper or aluminum on a substrate, and/or depositing conductive ink by means of screen printing, photographic or offset printing processes or the like. However, such manufacturing methods require too many steps and are relatively slow and expensive to apply. They are also not able to be incorporated into a cardboard roll manufacturing process.
In accordance with the present invention a process is provided for manufacturing an auxiliary antenna for an RFID tag that at least alleviates the above described disadvantages of the prior art. Further in accordance with the present invention, a process is provided for manufacturing an auxiliary antenna for an RFID tag that may be incorporated into a roll manufacturing process such as a cardboard roll manufacturing process.
According to one aspect of the present invention there is provided a method of forming on a moving surface an auxiliary antenna for an RFID tag, said method including the steps of:
providing a webstock of polymeric material including a conductive film, said webstock of polymeric material including a release layer to facilitate release of said conducting film from said webstock;
conveying said webstock with said moving surface;
applying an adhesive to said moving surface in a shape corresponding to said auxiliary antenna.
pressing said conductive film to said adhesive by means of a pressing roller such that portions of said conductive film adhere to said surface in said shape corresponding to said auxiliary antenna; and
pulling said web stock from said surface such that said adhered portions of said conductive film peel away from said webstock leaving said portions adhered to said moving surface in said shape corresponding to said auxiliary antenna.
The moving surface may include cardboard in a roll manufacturing process. The webstock preferably is conveyed between a supply roller and a take up roller.
The step of applying the conductive film may include cold stamping. Cold stamping may include applying adhesive to the moving surface. The adhesive may be applied substantially in a shape corresponding to the antenna. The adhesive may be applied via an offset printing roller. Cold stamping may include pressing the conductive film to the adhesive via a pressing roller and curing the adhesive with ultra violet light.
The step of applying the conductive film may include hot stamping. Hot stamping may include applying adhesive to the conductive film and pressing the film to the moving surface via a pressing roller. The pressing roller may have a relief portion substantially in a shape corresponding to the antenna. Hot stamping may include curing the adhesive via application of heat.
The method of the present invention may include applying an RFID tag over the auxiliary antenna. The RFID tag may include a tag antenna. The RFID tag preferably is applied over the auxiliary antenna such that it is electromagnetically coupled with the tag antenna. The method may include punching the cardboard surface into carton blanks such that the auxiliary antenna is positioned on a side panel of the carton. The method may include embossing each carton blank with fold lines, folding the blank along the fold lines and assembling the blank into a carton.
According to a further aspect of the present invention there is provided an apparatus for forming on a moving surface an auxiliary antenna for an RFID tag, said apparatus including:
means for providing a webstock of polymeric material including a conductive film;
means for conveying said webstock with said moving surface; and
means for applying said conductive film to said moving surface in a shape corresponding to said antenna.
Preferred embodiments of the present invention will now be described with reference to the accompanying detailed description which refers to the drawings wherein:
Pressure applied by roller 17 causes the conductive film 16 to adhere to the adhesive 13 in the shape corresponding to the auxiliary antenna 20. The adhesive is cured via the UV source 18. As webstock 15 is pulled away from surface 11 the conductive film peels away from webstock 15 and the webstock excluding portions corresponding to the peeled antennas is taken up by roller 19.
An RFID tag module 21 is then positioned and applied over the auxiliary antenna 20. The carton blank is subsequently punched from the cardboard roll at punching station 22 prior to being embossed with fold lines 28 (refer
The color of the varnish may be defined in accordance with a specific use. The defined color may provide an anti-counterfeiting measure and/or a means for coding products, e.g. the varnish may be colored red for dangerous goods, blue for safe goods, green for perishable goods, etc. Colored varnish may also be used for aesthetic purposes.
An additional or alternative anti-counterfeiting/coding measure may include adjusting relative thickness of the first and second conductive materials 26/36, 27/37. In one form the relative thickness of the conductive materials may be 75% aluminum and 25% copper. The relative thicknesses of the first and second conductive materials may be detected and/or measured by means of x-ray fluorescence spectroscopy. If a detected and/or measured thickness of the first and second conductive materials does not substantially agree with an expected relative thickness of the conductive materials, the product may be treated as being counterfeit or non-genuine.
Pressing roller 45 includes a relief portion 47 in a shape corresponding to the auxiliary antenna 48. Pressure applied by the relief portion 47 of roller 45 causes conductive film 44 to adhere to the surface 41 in the shape corresponding to the antenna 48. Adhesive provided on the conductive film 44 is cured by the heat source. As webstock 43 is pulled away from surface 41, the conductive film peels away from webstock 43 and the webstock excluding portions corresponding to the peeled antennas is taken up by roller 46.
An RFID tag module 49 is then positioned and applied over the conductive antenna 48. The carton blank is subsequently punched from the cardboard roll at punching station 50 prior to being embossed with fold lines, folded and assembled into a carton as described with reference to
Finally, it is to be understood that various alterations, modifications and/or additions may be introduced into the constructions and arrangements of parts previously described without departing from the spirit or ambit of the invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims.
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|US20080088459 *||Aug 16, 2007||Apr 17, 2008||Tagsys Sas||Method and apparatus for manufacturing an auxiliary antenna|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8505829||Oct 16, 2012||Aug 13, 2013||Wal-Mart Stores, Inc.||RFID tag sensors and methods|
|US8544758||Oct 16, 2012||Oct 1, 2013||Wal-Mart Stores, Inc.||Universal RFID tags and methods|
|US8857724||Mar 14, 2013||Oct 14, 2014||Wal-Mart Stores, Inc.||Universal RFID tags and methods|
|US8857725||Jul 16, 2013||Oct 14, 2014||Wal-Mart Stores, Inc.||RFID tag sensors and methods|
|U.S. Classification||29/600, 29/825, 343/867, 156/264, 340/572.8|
|Cooperative Classification||G06K19/07749, Y10T29/49117, Y10T156/1075, Y10T29/49016|
|Nov 13, 2007||AS||Assignment|
Owner name: TAGSYS SAS, FRANCE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MARTIN, PHILIPPE;LECIRE, PHILIPPE;REEL/FRAME:020108/0299
Effective date: 20071101
|Oct 18, 2011||CC||Certificate of correction|
|Mar 20, 2014||FPAY||Fee payment|
Year of fee payment: 4